Thank you Mixos for these links of samples. I've found an other one if you want to implement in your list : http://www.rfmd.com/orderSample.asp I havn't try it. But I tryed : TEXAS I. : less than 2 days to recive components Fairchild : I'm waitting since 1 month. 1 week ago, I recive mail of shipping Microchip : waitting since 1 month, 2 weeks ago, I recive mail of shipping National I. : never : When I confirm the order, they suggest me to pay ::) For your information, I'm in France. Djipe.